693 Opensource replacement of sunwlibm

Reviewed by: Igor Kozhukhov ikozhukhov@gmail.com
Reviewed by: Keith M Wesolowski <keith.wesolowski@joyent.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Dan McDonald <danmcd@omniti.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/usr/src/lib/libm/common/complex/ccoshl.c b/usr/src/lib/libm/common/complex/ccoshl.c
new file mode 100644
index 0000000000..0f65741c97
--- /dev/null
+++ b/usr/src/lib/libm/common/complex/ccoshl.c
@@ -0,0 +1,91 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma weak ccoshl = __ccoshl
+
+#include "libm.h"	/* coshl/expl/fabsl/scalbnl/sincosl/sinhl/__k_cexpl */
+#include "complex_wrapper.h"
+
+/* INDENT OFF */
+static const long double zero = 0.0L, half = 0.5L;
+/* INDENT ON */
+
+ldcomplex
+ccoshl(ldcomplex z) {
+	long double t, x, y, S, C;
+	int hx, ix, hy, iy, n;
+	ldcomplex ans;
+
+	x = LD_RE(z);
+	y = LD_IM(z);
+	hx = HI_XWORD(x);
+	ix = hx & 0x7fffffff;
+	hy = HI_XWORD(y);
+	iy = hy & 0x7fffffff;
+	x = fabsl(x);
+	y = fabsl(y);
+
+	(void) sincosl(y, &S, &C);
+	if (ix >= 0x4004e000) {	/* |x| > 60 = prec/2 (14,28,34,60) */
+		if (ix >= 0x400C62E4) {	/* |x| > 11356.52... ~ log(2**16384) */
+			if (ix >= 0x7fff0000) {	/* |x| is inf or NaN */
+				if (y == zero) {
+					LD_RE(ans) = x;
+					LD_IM(ans) = y;
+				} else if (iy >= 0x7fff0000) {
+					LD_RE(ans) = x;
+					LD_IM(ans) = x - y;
+				} else {
+					LD_RE(ans) = C * x;
+					LD_IM(ans) = S * x;
+				}
+			} else {
+				t = __k_cexpl(x, &n);
+						/* return exp(x)=t*2**n */
+				LD_RE(ans) = scalbnl(C * t, n - 1);
+				LD_IM(ans) = scalbnl(S * t, n - 1);
+			}
+		} else {
+			t = expl(x) * half;
+			LD_RE(ans) = C * t;
+			LD_IM(ans) = S * t;
+		}
+	} else {
+		if (x == zero) {	/* x = 0, return (C,0) */
+			LD_RE(ans) = C;
+			LD_IM(ans) = zero;
+		} else {
+			LD_RE(ans) = C * coshl(x);
+			LD_IM(ans) = S * sinhl(x);
+		}
+	}
+	if ((hx ^ hy) < 0)
+		LD_IM(ans) = -LD_IM(ans);
+	return (ans);
+}